rez's are and were always on undesirable land.
when the colonist came over they gave them land plots (rez's ) that were not good for crops or living on essentially it was land that white people would not live on or use because of the soil or water conditions etc
and so they have continued to be problematic because thats how the land is ...it takes a ton of money to fix land problems, like water or soil issues, and because the FNs are already soooo limited on funds and where they go and how they are distributed, its easy to see that the water conditions or land problems become essentially money pits where they can only try so hard before the problems become too much money too fix
